Explain magic number, var renaming
Explain magic number, var renaming

This extracts a constant and comments it for clarity. Also renames a
confusing waitgroup

mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdata/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,li-ang/influxdb,nooproblem/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdb/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,li-ang/influxdb,influxdb/influxdb,influxdata/influxdb,nooproblem/influxdb,influxdb/influxdb